How do I create an empty JSON array?
I tried $finalJSON["items"][0] = ''; but that gave me {"items":[""]}
I tried $finalJSON["items"][0] = null; but that gave me {"items":[null]}
What I actually want is {"items":[]}
How to achieve this?
Your code actually creates an array with already one element with key 0 and value '' (empty string) or null. Instead, use:
$finalJSON["items"] = array();
Try this:
$arr['items'] = array();
echo json_encode($arr);
You should set an empty array:
$finalJSON = [];
$finalJSON["items"] = [];
echo json_encode($finalJSON);
Output:
{"items":[]}
Consider this example:
<?php
$items = [];
echo json_encode($items);
The output is: [].
That is the "most empty" array you can create and convert into a json encoding.
So if you want such an array as value inside an object as property item, then use an object:
<?php
class myObject {
public $items = [];
}
echo json_encode(new myObject);
The output is: {"items":[]}
$finalJSON["items"] = []; //short syntax
or
$finalJSON["items"] = array(); //old syntax
and to output:
echo json_encode($finalJSON);
This should work
<?php
$finalJSON["items"] = array();
echo json_encode($finalJSON);
?>
JSONarray" (or "JSONobject").JSONis a portable text representation of some data structure. If you want to encode asJSONan empty array then create an empty array (array()or[]on PHP 5.4 and newer) and encode it usingjson_encode().